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  <title>Set/Get character encoding for multibyte regex</title>
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  <div id="layout-content"><div id="function.mb-regex-encoding" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">mb_regex_encoding</h1>
  <p class="verinfo">(PHP 4 &gt;= 4.2.0, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">mb_regex_encoding</span> &mdash; <span class="dc-title">Set/Get character encoding for multibyte regex</span></p>

 </div>
   
 <div class="refsect1 description" id="refsect1-function.mb-regex-encoding-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>mb_regex_encoding</strong></span>(<span class="methodparam"><span class="type">?</span><span class="type"><span class="type">string</span><span class="type"></span></span> <code class="parameter">$encoding</code><span class="initializer"> = <strong><code>null</code></strong></span></span>): <span class="type"><span class="type">string</span>|<span class="type">bool</span></span></div>

  <p class="para rdfs-comment">
   Set/Get character encoding for a multibyte regex.
  </p>
 </div>


 <div class="refsect1 parameters" id="refsect1-function.mb-regex-encoding-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">encoding</code></dt>

     <dd>

      <p class="para"><code class="parameter">encoding</code>
参数为字符编码。如果省略或是 <strong><code>null</code></strong>，则使用内部字符编码。</p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.mb-regex-encoding-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="simpara">
   If <code class="parameter">encoding</code> is set, then 
   成功时返回 <strong><code>true</code></strong>， 或者在失败时返回 <strong><code>false</code></strong>。 
   In this case, the internal character encoding is NOT changed.
   If <code class="parameter">encoding</code> is omitted, then 
   the current character encoding name for a multibyte regex is returned.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.mb-regex-encoding-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
  <td>8.0.0</td>
  <td>
   现在 <code class="parameter">encoding</code> 可以为 null。
  </td>
 </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-function.mb-regex-encoding-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.mb-internal-encoding.html" class="function" rel="rdfs-seeAlso">mb_internal_encoding()</a> - 设置/获取内部字符编码</span></li>
    <li class="member"><span class="function"><a href="function.mb-ereg.html" class="function" rel="rdfs-seeAlso">mb_ereg()</a> - Regular expression match with multibyte support</span></li>
   </ul>
  </p>
 </div>


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